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A kind of water-based polyurethane-acrylate hybrid resin and its preparation method and application in leather finishing agent

A water-based polyurethane and acrylate technology, applied in the direction of coating, etc., can solve the problems of unusable, poor anti-sticking performance of paint film surface and poor coating performance of fillers, etc., and achieve good construction performance, excellent whitening resistance and coating performance good effect

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-adhesive performance of the paint film surface and the coating performance of fillers are poor
In the downstream leather production process, the surface-coated leather products will inevitably produce "face-to-face" stacking and extrusion of leather, so the coating film must have excellent anti-adhesive properties, otherwise it will be unusable due to the problem of product adhesion

Method used

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  • A kind of water-based polyurethane-acrylate hybrid resin and its preparation method and application in leather finishing agent
  • A kind of water-based polyurethane-acrylate hybrid resin and its preparation method and application in leather finishing agent
  • A kind of water-based polyurethane-acrylate hybrid resin and its preparation method and application in leather finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Add 68g to the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heated to 80℃ for 1h, then cooled to about 60℃, added 3.8g trimethylolpropane, 12.6g Dimethylolpropionic acid and 48 g of acetone were heated to 75°C for reaction, and NCO was measured by sampling every 1 h until NCO reached below 2%, and the reaction was stopped.

[0110] Cool to below 60°C (between 50-60°C), add 76g acetone, 32g butyl acrylate, 104.5g methyl methacrylate, 39g styrene, 19.5g perfluoroalkyl ethyl acrylate, mix and dissolve.

[0111] The temperature was lowered to below 40° C., 9.5 g of triethylamine was added, and the reaction was neutralized for 3 min.

[0112] The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under the high-speed shearing condition of 1500 r / min to obtain a water-based polyurethane-acrylate mixed emulsion.

[0113...

Embodiment 2

[0116] Add 68g to the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heated to 80℃ for 1h, then cooled to about 60℃, added 3.8g trimethylolpropane, 12.6g Dimethylolpropionic acid and 48 g of acetone were heated to 75°C for reaction, and NCO was measured by sampling every 1 h until NCO reached below 2%, and the reaction was stopped.

[0117] Cool to below 60°C (between 50-60°C), add 76g acetone, 32g butyl acrylate, 122g methyl methacrylate, 39g styrene, 2g perfluoroalkyl ethyl acrylate, mix and dissolve.

[0118] The temperature was lowered to below 40° C., 9.5 g of triethylamine was added, and the reaction was neutralized for 3 min.

[0119] The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under the high-speed shearing condition of 1500 r / min to obtain a water-based polyurethane-acrylate mixed emulsion.

[0120] The...

Embodiment 3

[0123] Add 68g to the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heated to 80℃ for 1h, then cooled to about 60℃, added 3.8g trimethylolpropane, 12.6g Dimethylolpropionic acid and 48 g of acetone were heated to 75°C for reaction, and NCO was measured by sampling every 1 h until NCO reached below 2%, and the reaction was stopped.

[0124] Cool down to below 60°C (between 50-60°C), add 76 g of acetone, 32 g of butyl acrylate, 88 g of methyl methacrylate, 39 g of styrene, and 36 g of perfluoroalkyl ethyl acrylate, and mix and dissolve.

[0125] The temperature was lowered to below 40° C., 9.5 g of triethylamine was added, and the reaction was neutralized for 3 min.

[0126]The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under the high-speed shearing condition of 1500 r / min to obtain a water-based polyurethane-acryla...

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Abstract

The invention provides a water-based polyurethane-acrylate hybrid resin, a preparation method thereof, and an application in a leather finishing agent. The preparation method of the invention comprises: mixing and dissolving a diluting monomer and an isocyanate-terminated prepolymer, neutralizing After the reaction, high-speed shear dispersion is performed to obtain a pre-hybrid emulsion, and an initiator is added to the pre-hybrid emulsion to initiate polymerization; the isocyanate-terminated prepolymer is obtained by mixing and reacting diisocyanate, macromolecular polyol and chain extender. obtained; the macromolecular polyol includes at least one of polyether diol and polyester diol. The water-based polyurethane-acrylate hybrid resin prepared by the preparation method of the present invention not only has a simple and controllable preparation process, but also the leather finishing agent prepared from the above-mentioned water-based polyurethane-acrylate hybrid resin is suitable for the field of high-end leather finishing agents and has weather resistance It has the advantages of high performance, smooth hand feeling, good anti-sticking performance, good anti-blanking performance, good covering ability to fillers, high black transparency and good scratch resistance.

Description

technical field [0001] The invention relates to the field of water-based leather finishing agents, in particular to an aqueous polyurethane-acrylate hybrid resin that can be used for leather finishing agents, a preparation method thereof, and application in leather finishing agents. Background technique [0002] Surface finishing is one of the most important processes in the tanning process. In order to make the appearance and feel of artificial leather closer to genuine leather, the surface of artificial leather is usually treated with gloss, matt and improved handle surface finishing to obtain soft luster and similar properties. The feel of natural leather, and after the leather is surface-coated, it will also be endowed with necessary properties such as scratch resistance, abrasion resistance, alcohol resistance, bending resistance, high temperature yellowing resistance, and ultraviolet light resistance. [0003] In the prior art, water-based polyurethane resins have been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/14C08G18/75C08G18/66C08G18/42C08G18/34C08G18/32C09D151/08
CPCC08F283/006C08G18/758C08G18/4238C08G18/348C08G18/3206C09D151/08C08F220/14
Inventor 李英卓胡海东邓俊英张洁
Owner WANHUA CHEM GRP CO LTD
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